Learn about gravity and all the useful things it does - such as keeping us on the Earth and holding the entire universe together! You Wouldn't Want to Live Without Gravity! is part of a brand-new science and technology strand within the internationally acclaimed You Wouldn't Want to Be series.Learn about gravity and all the useful things it does - such as keeping us on the Earth and holding the entire universe together! You Wouldn't Want to Live Without Gravity! is part of a brand-new science and technology strand within the internationally acclaimed You Wouldn't Want to Be series.